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In page Broteas:

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This ancient rock carving was famous in antiquity. It's located near the town of Magnesia ad Sipylum, and it was believed to have been carved by Broteas. He was said to have carved the most ancient image of the Great Mother of the Gods (Cybele), an image that in Pausanias' day (2nd century CE) was still held sacred by the Magnesians.